What is Mark Oberdoerster's specialty?

Mark Oberdoerster (NPI 1932197423) is a Medicare-billing provider whose primary specialty is Internal Medicine in Ann Arbor, MI.

Where does Mark Oberdoerster practice?

Mark Oberdoerster practices in Ann Arbor, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1932197423.

How much does Medicare pay Mark Oberdoerster?

Mark Oberdoerster (NPI 1932197423) received approximately $36K in total Medicare Part B payments, serving 384 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1932197423

Mark OberdoersterMD

Internal MedicineAnn Arbor, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

875

Unique beneficiaries

—

Total services

1,002

Distinct HCPCS

Medicare payment

$30K

Peer benchmark

Total Medicare services vs. 3,459 Internal Medicine providers in MI — top quintile (cohort median 549).

PRESCRIBING · PART D · 2024

Total Rx claims

11,599

Beneficiaries

—

Total drug cost

$1.6M

Distinct drugs

122

Brand share

20.2%

Top prescribed drugs

Atorvastatin Calcium1,179 claims

Lisinopril727 claims

Amlodipine Besylate663 claims

Losartan Potassium572 claims

Simvastatin450 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mark Oberdoerster's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 14 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
REGENTS OF THE UNIVERSITY OF MICHIGAN	62	282
Sara Hashemian Internal Medicine · Ann Arbor, MI	28	71
Peter Paul Geriatric Medicine · Ann Arbor, MI	23	59
BORLAZA, GIL	17	64
SAINT JOSEPH MERCY LIVINGSTON HOSPITAL	16	133
Eric Straka Internal Medicine · Ann Arbor, MI	16	41
Jacob Livermore Diagnostic Radiology · Ypsilanti, MI	15	39
Marlo Leonen Cardiology · Ypsilanti, MI	15	64
Jihn Han Clinical Cardiac Electrophysiology · Ypsilanti, MI	15	75
James Landi Diagnostic Radiology · Lakewood, CO	14	34
Tauqir Goraya Cardiology · Ypsilanti, MI	13	55
Benjamin Mccallister Internal Medicine · Ypsilanti, MI	12	35

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events